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Providing evidence to improve practice

Action: Pollination: Use no tillage in arable fields Mediterranean Farmland

Key messages

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Pollination (0 studies)

Crop visitation (0 studies)

Pollinator numbers (1 study): One replicated, randomized, controlled study from the USA found more pollinators in plots with no tillage, compared to deep tillage.

Implementation options (0 studies)

Supporting evidence from individual studies


A replicated, randomized, controlled study in 2012–2013 in an irrigated squash field in the Central Valley, California, USA, found more soil-nesting bees in plots with no tillage, compared to deep tillage. Pollinator numbers: More Peponapis pruinosa squash bees emerged from nests in plots with no tillage, compared to deep tillage (11 vs 8 bees/cage). Methods: In August 2012, bee nests were established in 20 plots (3 x 3 x 1.8 m field cages), each of which contained drip-irrigated squash plants. Deep tillage (disking, ripping, and subsoiling: 41 cm maximum depth) was used on 10 of these plots, in autumn 2012. Emerging bees were collected in blue vane traps (26 May–26 September 2013).


Referenced papers

Please cite as:

Shackelford, G. E., Kelsey, R., Robertson, R. J., Williams, D. R. & Dicks, L. V. (2017) Sustainable Agriculture in California and Mediterranean Climates: Evidence for the effects of selected interventions. Synopses of Conservation Evidence Series. University of Cambridge, Cambridge, UK.